Clothes-line pulley.



No. 635,604. Patented Oct. 24, I899.

8. H. M. SEIB.

CLOTHES LINE PULLEY.

(Application filed Nov. 20, 1897.)

(No Model.)

|NVENTUR= Q/Gf 116% 4% BY ATTORNEYS.

UNITED STATES PATENT Orricn.

SIMON H. M. SEIB, OF JERSEY CITY, NElV JERSEY.

CLOTH ES-LIN E PU LLEY.

SPECIFICATION forming part of Letters Patent No. 635,604, dated October 24, 1899. Application filed November 20, 1897. Serial No. 659,232. (No model.)

To all whom it may concern:

Be it known that I, SIMON H. M. SEI'B, a citizen of the United States, residing at Jersey City, in the county of Hudson and State of New Jersey, have invented certain new and useful Improvements in Clothes-Line P ulleys, 850.; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which 'form a part of this specification.

This invention relates to that class of pulleys represented by my prior patent, No. 327,326, dated September 29, 1885, and has for its objects to prevent the line or rope which runs through the pulley from becoming displaced from the sheave and wedged in between the sheave and side plate, to provide for a sheave formed of two dish-shaped or concave sections a bearing more durable and efiective than has been in use heretofore, to provide these improvements at very small additional cost and labor of making, and to secure other advantages and results, some of which may be referred to hereinafter in connection with the description of the working parts.

The invention consists in the improved pu lley for clothes-lines and in the arrangements and combinations of parts thereof, all substantially as will be hereinafter set forth and finally embraced in the clauses of the claim.

Referring to the accompanying drawings, in which like letters of reference indicate corresponding parts in each of the views, Figure 1 is a side view of my improved pulley. Fig. 2 is an edge View of the same. Fig. 3 is a section of the same on line 00, Fig. 2. Fig. 4 is a sectional view of the sheave and its bearings in a plane passed through a diameter and the axle of said sheave; and Fig. 5 is an enlarged portion of the same, showing more plainly certain central disks.

In said drawings, a a indicate side plates which are parallel at the opposite sides of the sheave and above said sheave are bowed outwardly, as at a, to provide for the passage of the knot in the endless rope. These side plates are centrally cut away or of open-work construction to secure lightness and cheap ness. At their upper ends said side plates have flattened bearings b 1), whereby they are rivet-ed together, said bearings being vertically grooved on their inner faces, providing a passage for the shank c of a swivel-eye c, which is prevented by a head 0 from being withdrawn from said passage. At their lower ends the said side plates a a terminate in cross-pieces d d, which provide bearings for the ends of the axle e of the sheave, said axle serving also as a rivet to hold the lower ends of the side plates together and being stationary, or the side plates at a may be continued below said cross-piece cl and be bent inward toward each other and riveted together, as shown in my prior patent above referred to, in this construction the sheave-axle e being free to rotate in its bearings in the crosspieces (Z (1. Of said open-work side plates each preferably comprises two bars a extending upward from the ends of the crosspiece 61 ortoward the swivel-eye c, where they are joined together, the edges of the rim of the sheave being thus laterally exposed except where said narrow bars extend upward past said rim.

It was found in practical use of the pulley shown in said prior patent that the rope or clothes-line, which is not usually more than one-quarter of an inch in diameter, was liable to slip or run off the sheave and become wedged in the crevice or space between the sheave and the side plate, thus stopping the action of the pulley and causing great inconvenience and delay. This fault I effectually remedy in my present construction by means of guards g 9. These guards are formed or cast integral with the bars a of each side plate just above the periphery of the sheave and extend transversely across said narrow bars. Said guards project sufiiciently from the bars a to extend across the crevice be tween the sheave and side plate. The projecting guard is formed with a sharp recess h beneath, in which the edge of the sheave lies, and the upper surface is sloping, as at i, and adapted to allow the rope to slide back onto the grooved periphery of the sheave in case said rope has been thrown off into the space j. Said upper sloping surfaces are preferably so disposed on the bars a of a side plate that a straight line connecting them will not touch the sheave, and thus the crevice between the side plates and sheave is as effectually guarded at the top against the entrance of the rope as if solid side plates with continuous guards were used. If the rope by reason of slackness or undue twisting of the pulley out of its proper plane runs off the sheave, it will be thrown by said guards upward into the spacej between the side plates, and thus kept away from working into said crevice. From said space j the rope will slide back into the middle of the groove, as has been explained. The separation of the bars a of each plate by the length of the crosspiece 61 brings the guards sufficiently far out over the front and rear of the sheave to prevent the rope entering the crevices at said front and rear, as will be understood.

The sheave 0 is formed of two dislrshaped or concave sections 13 p, stamped from sheet metal and each having an annular bearingsurface q, whereby the two sections may be brought fiatwise together and firmly fastened by rivets or by alternate tongues and slits struck out of each bearing-surface q. The pe ripheral flanges 1' r of the sections coming together form the groove in the periphery of the sheave. In the process of stamping out the sections a central boss 8 is formed, which projects into the concavity of the section and is centrally perforated to receive the axle e of the sheave. These bosses thus afford bearings for the sheave, but are found to be weak in that the edges 3' of the perforations cannot stand the strain brought upon them and bend, split, or wear rapidly away. To remedy this fault, I clamp inside of the cavity, be-

tween the bosses s s at the center of the sheave, central disks or buttons t If. These disks are slightly concave on one side, as at 25, to secure a certain amount of elasticity as they are clamped together, and on the other side are convex, as at 25, to fit against the inner surface of the bosses s 8. Two of these disks are placed, with their concave sides in contact, in the cavity between the bosses s 5 previous to riveting the sections together, said disks having been centrally bored to loosely receive the axle e. The disks are of a thickness about equal to the depth of the bosses s s and of a diameter somewhat less than the diameter of said bosses, and when the sheave-sections are riveted together the disks are firmly and immovably pressed in contact with each other and the interior surface of the central cavity of the sheave, the edges of the disks being free and their convex outer sides engaging the sheavesections. The strain upon the sheave is then distributed among the edges 3 s and the disks t t and so transmitted to the axle e, and the sheave is thus given a broad, firm, and durable bearing upon said axle e.

Having thus described the invention, what I claim as new isl. The combination of a sheave formed of two opposite sections, each having a vertical annular Web and a central outward ly-rounded hollow boss, and being fastened flatwise together at said vertical webs, and a button 'or disk arranged in the cavity formed by said opposite bosses and clamped firmly into contact at its rounded outer side with the inner concave side wall of the cavity, substantially as set forth.

2. The combination with a sheave and axle, said sheave being formed of sections fastened together at annular joining-surfaces and having central bosses oppositely projecting out- 'ward and forming a cavity in the sheave, of

centrally-perforated disks or buttons fitted loosely upon said axle in said cavity and tightly clamped between said sections into contact with each other and the inner side walls of the cavity, substantiallyas set forth.

3. In a sheave, the combination with sections having outwardly-projecting centralhollow bosses, of disks or buttons clamped between said sections into solid contact with each other and the side walls 'of the cavity formed by said bosses, and being free at their edges, substantially as set forth.

4. The combination in a sheave comprising sections fastened together and having opposite central bosses projecting outward, of concavo-convex disks or buttons clamped between said sections, their concave sides being contiguous, their convex sides against the side walls of the cavity, and their edges free, substantially as set forth.

In testimony that I claim the foregoing I have hereunto set my hand this 13th day of November, 1897.

SIMON H. M. SEIB.

Witnesses:

R. M. EVERETT, O. B. PITNEY. 

